It's an interesting question. Unfortunately, no, I actually don't have any particular "methods" to employ with regard to highlighting your extracurricular and socially-conscious activities beyond the quite obvious infusion of such experiences into your application essays. And to my knowledge, there is no way to discern a program which cares about such activities more than another. Obviously, intensive familiarity with graduate schools in your area of concern could be most helpful, but aside from befriending graduate students or grilling admissions folks, it may be hard to come by. More likely you will use your intuitive feel for how folks react to your casual comments a guide, and particularly find specific faculty members (read: potential advisors) who care to hear such stories.

I personally think that these experiences are hugely rich and worthy of inclusion in any applications essay, and so would recommend it highly. But to the specific point of what method to use to highlight such things, I can't give much more advice than that.

Might others of you have resources or experiences to share in this regard?